# US 8,219,156 B2 · Transceiver device and power saving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,219,156 B2 - Document ID: US8219156B2 - Status: Granted - Kind: B2 - Application number: 12/247,423 - Filed: 2008-10-08 - Published: 2010-02-04 - Granted: 2012-07-10 - Earliest claimed: 2008-07-30 - Assignees: IC Plus Corp. - Inventors: Tsu-Chun Liu - Web page: https://patentgrep.com/patent/US8219156B2 ## CPC - H04W 52/0241: {where no transmission is received, e.g. out of range of the transmitter} - H04B 17/336: Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] - H04W 52/48: during retransmission after error or non-acknowledgment - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A transceiver device and a power saving method thereof are provided. The transceiver device includes a transmitter, a receiver, and a control module. The control module is coupled to the transmitter and the receiver. After the control module lowers the output power of either the transmitter, the receiver, or both of them, the control module checks a signal transmission between the transceiver device and a far-end device is normal or not. When the signal transmission between the transceiver device and the far-end device is abnormal, the control module readjusts the output power of the transmitter, the receiver, or both of them. Thereby, the power consumption of the transceiver device is decreased. ## Claims ### Claim 1 A transceiver device, comprising: a transmitter; a receiver; and a control module, coupled to the transmitter and the receiver, for checking a signal transmission between the transceiver device and a far-end device is normal or not after lowering output power of the transmitter, the receiver or both of them, wherein when the signal transmission between the transceiver device and the far-end device is abnormal, the control module readjusts the output power of the transmitter and the receiver; wherein, the transmitter transmits a plurality of signals encoded by at least two different encoding formats separately in sequence to the far-end device, and the control module checks the encoding format of each of a plurality of received signals encoded by a first encoding format from the far-end device received by the receiver to determine the signal transmission between the transceiver device and the far-end device is normal or not, and the transmitter transmits a plurality of transmitted signals encoded by a second encoding format to inform the far-end device that the adjustment of the receiver has been finished when the signal transmission between the transceiver device and the far-end device is normal. ### Claim 2 (depends on 1) The transceiver device according to claim 1, wherein the control module comprises: a timer, for timing a period of time when the transmitter transmits a signal to the far-end device; and an analysis circuit, coupled to the receiver and the timer, for checking whether the transceiver device receives a confirmation signal outputted by the far-end device in the above period of time or not, thereby determining whether the far-end device can receive the signal output from the transmitter normally or not. ### Claim 3 (depends on 1) The transceiver device according to claim 1, wherein the control module comprises: an analysis circuit, coupled to the receiver, for receiving a signal outputted by the far-end device, and analyzing a parameter of the signal, thereby determining whether the transceiver device can receive the signal outputted by the far-end device normally or not. ### Claim 4 (depends on 3) The transceiver device according to claim 3, wherein the parameter comprises an intensity of the signal, a signal-to-noise ratio (SNR), a power, or a combination thereof. ### Claim 5 (depends on 1) The transceiver device according to claim 1, wherein the transmitter comprises: an adjustable power supply, coupled to the control module, and controlled by the control module to adjust the output power. ### Claim 6 (depends on 5) The transceiver device according to claim 5, wherein the adjustable power supply is an adjustable voltage source or an adjustable current source. ### Claim 7 A power saving method of a transceiver device, wherein the transceiver device comprises a transmitter and a receiver, the method comprising: lowering output power of the transmitter and the receiver; checking whether a signal transmission between the transceiver device and a far-end device is normal or not; and readjusting the output power of the transmitter and the receiver when the signal transmission between the transceiver device and the far-end device is abnormal, wherein, a plurality of signals encoded by at least two different encoding formats separately transmitted by the transmitter to the far-end device in sequence, and the encoding format of each of a plurality of received signals encoded by a first encoding format from the far-end device received by the receiver is checked by a control module for determining the signal transmission between the transceiver device and the far-end device is normal or not, and the transmitter transmits a plurality of transmitted signals encoded by a second encoding format to inform the far-end device that the adjustment of the receiver has been finished when the signal transmission between the transceiver device and the far-end device is normal. ### Claim 8 (depends on 7) The power saving method of a transceiver device according to claim 7, wherein the step of checking whether the signal transmission between the transceiver device and the far-end device is normal or not comprises: determining whether the far-end device can receive a signal outputted by the transmitter normally or not. ### Claim 9 (depends on 8) The power saving method of a transceiver device according to claim 8, wherein the step of determining whether the far-end device can receive the signal outputted by the transmitter normally or not comprises: transmitting a signal from the transmitter to the far-end device, and timing a period of time; and checking whether the transceiver device receives a confirmation signal outputted by the far-end device in the above period of time or not, thereby determining whether the far-end device can receive the signal outputted by the transmitter normally or not. ### Claim 10 (depends on 7) The power saving method of a transceiver device according to claim 7, wherein the step of checking whether the signal transmission between the transceiver device and the far-end device is normal or not comprises: determining whether the transceiver device can receive a signal outputted by the far-end device normally or not. ### Claim 11 (depends on 10) The power saving method of a transceiver device according to claim 10, wherein the step of determining whether the transceiver device can receive the signal outputted by the far-end device normally or not comprises: receiving the signal outputted by the far-end device; and analyzing a parameter of the signal, thereby determining whether the transceiver device can receive the signal outputted by the far-end device normally or not. ### Claim 12 (depends on 11) The power saving method of a transceiver device according to claim 11, wherein the parameter comprises an intensity of the signal, a signal-to-noise ratio (SNR), a power, or a combination thereof.